From: Pavel Shilovsky pshilov@microsoft.com
commit e99c63e4d86d3a94818693147b469fa70de6f945 upstream.
Currently we skip SMB2_TREE_CONNECT command when checking during reconnect because Tree Connect happens when establishing an SMB session. For SMB 3.0 protocol version the code also calls validate negotiate which results in SMB2_IOCL command being sent over the wire. This may deadlock on trying to acquire a mutex when checking for reconnect. Fix this by skipping SMB2_IOCL command when doing the reconnect check.
Signed-off-by: Pavel Shilovsky pshilov@microsoft.com Signed-off-by: Steve French stfrench@microsoft.com Reviewed-by: Ronnie Sahlberg lsahlber@redhat.com CC: Stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/cifs/smb2pdu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -168,7 +168,7 @@ smb2_reconnect(__le16 smb2_command, stru if (tcon == NULL) return 0;
- if (smb2_command == SMB2_TREE_CONNECT) + if (smb2_command == SMB2_TREE_CONNECT || smb2_command == SMB2_IOCTL) return 0;
if (tcon->tidStatus == CifsExiting) {